In this Friday, November 3, 2017 photo, children march in a parade launching the country's month-long independence celebrations in Panama City. Panama begins celebrations by commemorating Panama's 1903 separation from Colombia on Nov. 3, and culminating on Nov. 28 by marking its 1821 independence from Spain. (Photo by Arnulfo Franco/AP Photo)

Children living in the Pantanal Favela hunt frogs in polluted waters to help their families, without fear of the danger of pollution in Rio de Janerio, Brazil on November 10, 2017. (Photo by Fabio Teixeira/Anadolu Agency/Getty Images)

People are seen participate during the traditional Skulls Parade as part of Day of the Dead celebrations at Reforma Avenue on October 28, 2017 in Mexico City, Mexico. (Photo by Carlos Tischler/NurPhoto via Getty Images)

An undated handout image provided by UNICEF Germany on 20 December 2016 shows the “UNICEF Photo of the Year 2016” by Iranian freelance photographer Arez Ghaderi. Ghaderi won the first prize for his picture of a girl in a makeshift tent city in the Razavi Khorasan province, Iran, it was announced at a ceremony in Berlin, Germany on 20 December 2016. (Photo by Ariz Ghaderi/EPA/UNICEF Deutschland)

A girl kisses an icon at an exhibition of handmade icons and items made by the convicts from the prisons in Chisinau, Moldova, 07 April 2016. (Photo by Dumitru Doru/EPA)

A boy plays with a ball at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni on April 26, 2016. Some 54,000 people, many of them fleeing the war in Syria, have been stranded on Greek territory since the closure of the migrant route through the Balkans in February. (Photo by Joe Klamar/AFP Photo)

A Syrian refugee child looks on, moments after arriving on a raft with other Syrian refugees on a beach on the Greek island of Lesbos, January 4, 2016. (Photo by Giorgos Moutafis/Reuters)

A Syrian boy cries outside a makeshift morgue following reported shelling by Syrian government forces in the rebel held town of Douma on the outskirts of Damascus, on October 26, 2017. (Photo by Amer Almohibany/AFP Photo)

A dead whale is seen on the shore of the Ipanema beach in Rio de Janeiro, Brazil November 15, 2017. (Photo by Pilar Olivares/Reuters)

A model blows a kiss as she and others parade the latest creations by Chinese designer Amelie Wang during China Fashion Week in Beijing, Tuesday, October 31, 2017. (Photo by Andy Wong/AP Photo)

In this July 26, 2017 file photo, a girl scavenges at a garbage dump in a street in Sanaa, Yemen. The United Nations and more than 20 aid groups said Thursday, November 9, 2017, that the Saudi-led coalition's tightening of a blockade on war-torn Yemen could bring millions of people closer to “starvation and death”. About two-thirds of Yemen's population relies on imported supplies, said the groups, which include CARE, Save the Children and Islamic Relief. (Photo by Hani Mohammed/AP Photo)

A boy dressed as Pennywise the Dancing Clown from the movie “It” poses for a photo during a Halloween party in Ciudad Juarez, Mexico, October 27, 2017. (Photo by Jose Luis Gonzalez/Reuters)

A child sits in a hammock at a construction site on the outskirts of Jammu March 21, 2017. (Photo by Mukesh Gupta/Reuters)

A Rohingya refugee girl fills a kettle with water from the river to drink as she waits to be taken to a refugee camp after crossing the Naf River at the Bangladesh-Myanmar border in Palang Khali, near Cox’s Bazar, Bangladesh November 2, 2017. (Photo by Adnan Abidi/Reuters)

Children visit tombs of relatives and friends at 'Nueva Esperanza' (New Hope) cemetery in Villa Maria del Triunfo on the outskirts of Lima, Peru on November 2, 2017. (Photo by Guadalupe Pardo/Reuters)

Students memorise the Koran at the Al-Nadwa Madrassa in Murree, Pakistan, October 3, 2017. (Photo by Caren Firouz/Reuters)

A Pokot girl cries after being circumcised in a village about 80 kilometres from the town of Marigat in Baringo County, October 16, 2014. The traditional practice of circumcision within the Pokot tribe is a rite of passage that marks the transition to womanhood and is a requirement for all girls before they marry. More than a quarter of girls and women in Kenya have undergone genital cutting, according to United Nations data. Despite a government ban on the life-threatening practice since 2011, the long-standing tradition remains a rite of passage, particularly among poor families in rural areas. Picture taken October 16, 2014. (Photo by Siegfried Modola/Reuters)

A child holds his brother's weapon before the swearing in ceremony for the military students, in Bucharest, Romania, Wednesday, October 25, 2017. The Romanian Army is celebrating their Army Day and marking 100-years since the landmark battle of Marasesti, a key World War I battle in 1917 when Romanian and Russian soldiers defeated German troops, halting a German offensive. (Photo by Vadim Ghirda/AP Photo)

A boy is seen on a donkey as a girl walks them during the autumn season in Hizan district of Bitlis, Turkey on October 27, 2017. (Photo by Ali Ihsan Ozturk/Anadolu Agency/Getty Images)

In this Wednesday, October 25, 2017 photo, young girls play together in Colorado City, Ariz. The community on the Utah-Arizona border has been home for more than a century to a polygamous sect that is an offshoot of mainstream Mormonism. The community is undergoing a series of changes as the sect's control of the town slips away amid government evictions and crackdowns. (Photo by Rick Bowmer/AP Photo)